This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A331561 #22 Jan 27 2020 16:04:01 %S A331561 1,2,3,4,5,6,12563124891,115233863842,123858133813,363254652118, %T A331561 1324658354423,1511864334458,1825693128524,2321856215149, %U A331561 2632654133853,3146626254542,3521445321466,12462982162122,12496523158865,13129883155583,13443165514365,14213435966581 %N A331561 The base-10 numbers with a digit product > 0 and which when written in bases 3,4,5,6,7,8,9 have three or more other base representations with the same digit product. %C A331561 This is a subsequence of A331565. %H A331561 Giovanni Resta, <a href="/A331561/b331561.txt">Table of n, a(n) for n = 1..61</a> (terms < 10^14) %e A331561 6 is a term as 6_10 = 6_7 = 6_8 = 6_9, so it has three other base representations where the digit product also equals 6. %e A331561 12563124891 is a term as 12563124891_10 = 5434343211123_6 = 623216541162_7 = 135464411233_8, so it has three other base representations where the digit product also equals 103680. %e A331561 115233863842 is a term as 115233863842_10 = 124534313342214_6 = 11216413452466_7 = 1532436234242_8, so it has three other base representations where the digit product also equals 829440. %Y A331561 Cf. A007954, A007089, A007090, A007091, A007092, A007093, A007094, A007095, A331565. %K A331561 nonn,base %O A331561 1,2 %A A331561 _Scott R. Shannon_, Jan 20 2020 %E A331561 Terms a(10) and beyond from _Giovanni Resta_, Jan 27 2020